Fix PlatformNotSupportedException when running in docker on Linux

Titanium.Web.Proxy/Network/Certificate/BCCertificateMaker.cs

@@ -16,6 +16,7 @@
 using Org.BouncyCastle.Security;
 using Org.BouncyCastle.Utilities;
 using Org.BouncyCastle.X509;
+using Titanium.Web.Proxy.Helpers;
 using Titanium.Web.Proxy.Shared;
 using X509Certificate = Org.BouncyCastle.X509.X509Certificate;
 
@@ -29,10 +30,6 @@ internal class BCCertificateMaker : ICertificateMaker
         private const int certificateValidDays = 1825;
         private const int certificateGraceDays = 366;
 
-        // The FriendlyName value cannot be set on Unix.
-        // Set this flag to true when exception detected to avoid further exceptions
-        private static bool doNotSetFriendlyName;
-
         private readonly ExceptionHandler exceptionFunc;
 
         internal BCCertificateMaker(ExceptionHandler exceptionFunc)
@@ -146,19 +143,11 @@ private static X509Certificate2 generateCertificate(string hostName,
             x509Certificate.PrivateKey = DotNetUtilities.ToRSA(rsaparams);
 #else
             var x509Certificate = withPrivateKey(certificate, rsaparams);
-            x509Certificate.FriendlyName = subjectName;
 #endif
 
-            if (!doNotSetFriendlyName)
+            if (RunTime.IsWindows)
             {
-                try
-                {
-                    x509Certificate.FriendlyName = ProxyConstants.CNRemoverRegex.Replace(subjectName, string.Empty);
-                }
-                catch (PlatformNotSupportedException)
-                {
-                    doNotSetFriendlyName = true;
-                }
+                x509Certificate.FriendlyName = ProxyConstants.CNRemoverRegex.Replace(subjectName, string.Empty);
             }
 
             return x509Certificate;